A high school student was suddenly called by his father to move back to Japan (from Hawai where he lived). He went to live with his half brother and other 2 guys. They're werecats (the half brother turns into a lion, the mangaka turns into a tiger and the fortune-teller turns into a black panther. The student doesn't change at all cause his mother is a human and his father is a lion.) Anyway the half brother has a "little" brother complex. The other 2 werecats guard the student too. There is this organization made by the government that is trying to get werecats into the lab. + they have weredogs employees too. They even kidnapped the student. His new family alway got him out (the half brother once bite of a dudes hand in the process of rescuing the student). In the end it turns out that the student changes too but into an African wildcat. They end up living together anyway. (the half brother is also an actor and a model)
Nekoka Danshi No Shitsukekata